Physical and Chemical Changes
Flashcard
•
Science
•
5th - 8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and mixing.
2.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the composition of the substance.
3.
FLASHCARD QUESTION
Front
What is an example of a physical change?
Back
Melted candle wax is an example of a physical change because it can return to its solid form.
4.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Frying an egg is an example of a chemical change because the egg transforms into a new substance that cannot return to its original state.
5.
FLASHCARD QUESTION
Front
How can you separate a mixture of sand and iron filings?
Back
You can separate sand from iron filings by pulling a magnet through the mixture, as iron is magnetic.
6.
FLASHCARD QUESTION
Front
What happens to water in puddles when left in the sun?
Back
The water in puddles evaporates when left in the sun, turning from liquid to vapor.
7.
FLASHCARD QUESTION
Front
What evidence shows that frying an egg is a chemical change?
Back
The egg is now cooked and cannot return to a raw egg, indicating a chemical change has occurred.
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